甲乙两人赛跑，计时开始时，甲在乙前方10（单位:m）处，图中，实线表示甲的速度曲线v=v1(t)（单位：m/s），虚线表示乙的速度曲线v=v2(t)，三块阴影部分面积的数值依次为10，20，3，计时开始后乙追上甲的时刻记为t0（单位：s），则（）。
某公司的员工中，拥有本科毕业证、计算机登记证、汽车驾驶证得人数分别为130，90.又知只有一种证的人数为140，三证齐全的人数为30，则恰有双证得人数为()
The professor asked a question, and David ________ a good answer.
Being extremely_____to the cold ，I do not like skating.
During the past two decades, research has ________ our knowledge of daydreaming.
______ we can hope for is to avoid complete failure in the coming game with that strong team.
I know my limitations, so I won ’t do anything ______ my ability.
I ‘ve been telling you_____not to do that ，but you neve listened to me.That ’s why you gotinto trouble.
Your bike needs_____.You ‘d better do i right now.
It ‘s_____my power to make final decision on the matter.
对于生理性黄疸描述错误的是（）
足月新生儿适宜的室温是（）